Partial product multiplying machine



Feb. 13, 1951 H. M. FLEMING 2,541,507

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PARTIAL PRODUCT MULTIPLYING MACHINE Feb. 13, 1951 H. M. FLEMING 2,541,507

PARTIAL PRODUCT MULTIPLYING MACHINE Filed Nov. 20, 1945 l7 Sheets-Sheet 12 INVENTOR x HawamZMFYPW fi/FTORNEY Feb. 13, 1951 H. M. FLEMING PARTIAL PRODUCT MULTIPLYING MACHINE l7 Sheets-Sheet 15 Filed Nov. 20, 1945 INVE TBR La 4TTORNEY w 1 fi H. M. FLEMING PARTIAL PRODUCT MULTIPLYING MACHINE Fgb. 13, 1951 17 Sheets-Sheet 14 Filed Nov. 20, 1945 INVENTO; fiowaidflfi'le ATTORNEY Feb. 13, 1951 H, M FLEMING 2,541,507

PARTIAL PRODUCT MULTIPLYING MACHINE Filed Nov. 20, 1945 17 Sheets-Sheet l5 Feb. 13, 1951 I H. M. FLEMING 2,541,507

I PARTIAL PRODUCT MULTIPLYING MACHINE Filed Nov. 20, 1945 1 17 Sheets-Sheet 16 INVENT OR x j I ATTORNEY Patented Feb. 13, 1951 PARTIAL PRODUCT MULTIPLYIN G MACHINE Howard M. Fleming, West Orange, N. J assignor to Monroe Calculating Machine Company, Orange, N. .L, a corporation of Delaware Application November 20, 1945, Serial No. 629,841

The invention has relation to multiplying machines, and more particularly to machines in which partial products, represented in a series of registration control devices, are selected in accordance with the entered multiplicand and multiplier, for registration in a product totalizer.

In multiplying machines of a different type, wherein registration of a product is effected by repeated registration of the multiplicand, the time necessary to complete a calculation has been reduced by effecting th registrations controlled by the higher value multiplier digits complementally. According to one feature of the present invention, a modification of this semi-complemental system of registration has been employed in order to reduce the number of partial product devices and thus to effect various other improvements in the structure and operation of the machine.

The invention consists in the novel construction and combination of parts, as set forth in the appended claims.

In the accompanying drawings, illustrating the invention:

Fig. 1 is a plan view of a listing machine to which the invention has been applied.

Fig. 2 is a vertical section taken through the factor keyboard of the machine.

Fig. 3 is a detail exploded perspective view of an accumulator wheel.

Fig. 4 is a right side elevation of the machine, with casing removed.

Fig. 5 is a detail plan view of the operation controlling slides and index bars.

Fig. 6 is a detail section on line 6-6, Fig. 5.

Fig. 7 is a vertical section taken on line 7-1, Fig. 1.

Fig. 8 is a detail right side elevation of certain factor entering parts, incompletely shown in Fig. 7, and illustrated in operated position.

Fig. 9 is an enlarged left side elevation of the factor value locking means and of certain multiplication control cams.

Fig. 10 is a section taken substantially in line Hll 0, Figure 16.

Fig. 11 is a detail perspective view of a portion of the units feeler actuating means.

Fig. 12 is a detail right side elevation of the multiplicand setting means.

Fig. 13 is a detail right side elevation of the multiplier setting means, with the parts located in normal position.

Fig. 14 is a similar view with the parts shown in an adjusted position.

Fig. 15 is a detail right side elevation of the 15 Claims. (Cl. 235-60) multiplier selection plates, shown in another position of adjustment.

Fig. 16 is a plan view of the product computing unit and associate-d parts.

Fig. 17 is a detail axial section through the multiplier selection plates.

Fig. 18 is a detail section showing the carriage latch.

Fig. 19 is a section taken substantially on line l9-l9, Fig. 10.

Fig. 20 is a perspective view of the carriage escapement means.

Fig. 21 is a detail front elevation of certain plus, minus operation selection means.

Fig. 22 is a bottom plan view of the carriage shifting and return means.

Fig. 23 is a left side elevation of the two way drive clutch and associated parts.

Fig. 24 is a similar view of said clutch, shown in an operating position.

Fig. 25 is a left side elevation showing various multiplication control devices.

Fig. 26 is a left side view of the carriage return clutch and associated parts, shown in partially operated position.

Fig. 27 is a left side elevation of the machine, with casing removed.

Fig. 28 is a detail right side elevation of the partial product transmission means.

Fig. 29 is a section taken on line 29-29., Fig. 10.

Fig. 30 is a detail plan view of the tens feelers and associated parts.

Fig. 31 is an axial section through the partial product plates.

Fig. 32 is a series of detail elevations showing the five partial product plates.

Fig. 33 is a series of detail elevations showing the three multiplier selection plates.

Fig. 34 is a table showing the partial product values and illustrating the system of multiplication.

Fig. 35 is a timing diagram illustrating the movements of various parts.

THE LISTING MACHINE The multiplying mechanism forming the subject matter of the present invention is applicable to listing adding machines of widely varying construction. In the present disclosure it is shown as applied to the structure of the known Monroe adding-listing machines, illustrated in United States Patents 2,055,623; 2,261,341; 2,307,669; 2,330,270; 2,330,689 and 2,348,789, issued to Loring P. Crosman.

In accordance with these disclosures, amounts set up by the digit keys 2i'5 (Figs. 1, 2) may be transferred to an accumulator tit, upon operation of the machine, by means of a series of differential actuators 6H1 which also serve to set the appropriate type on the printing line. These differential actuators are spring operated, and are normally restrained by frame 6I6. Each actuator Gil] is formed as a three armed lever, fulcrumed at 658, the forward arm thereof having segmental gear teeth for rotating an accumulator wheel; the upper arm being pivotally connected with a digit index bar 6I5, and the rearward arm being pivotally connected with a type bar H of the printing mechanism. Theactuators are normally held under restraint of a series of column latches 2M, each latch being releasable upon depression of any key 2I5 in the same column by means of a slide 2 I3. Upon operation of the machine and consequent movement of the frame BIB, the released actuators will be rotated counter-clockwise each until stopped by contact of a lug o'f'the related index bar BIS with the stem of a depressed key. This movement will bring given type of the bars BII opposite the printing line of the record sheet and may alsoregulate the degree of rotation of the accumulator \VhGslS 413, should the pinions 463 of said wheels be maintained in mesh with the segment teeth of actuators 6H3 either during the counter-clockwise movement thereof or during their restoration to normal restrained position.

The accumulator 4'13 is provided with tens transfer mechanism of the crawl type, illustrated in Figure 3 of the drawings. Each numeral wheel of the accumulator includes a pinion 483, this pinion being coupled by engagement of members 41m, 4' with a floating gear 4Y0. Floating gear 478 engages the internal gear teeth of numeral wheel 413 and is mounted upon an eccentric 43B, fast upon a sleeve extending from the adjacent lower order numeral wheel. Movements imparted to pinion 4% are transmitted to numeral wheel 413 by rotary movement of floating gear 4%, and at the same time rotation of cam 43!) will carry the next higher order floating gear 41!} in an orbit within the teeth of its numeral wheel gear 413, resulting in a movement of this higher order numeral wheel of one-tenth the extent of movement of the lower order wheel.

Since the actuators 6i 0 are used in multiplioa tion only to effect'non-accumulating (commonly termed non-add) and total taking operations, the present description will omit reference to the setting for addition'and for subtraction. Similarly, although in practice a number of plural orderacoumulators 4H3, may be provided, we are here concerned with a single product accumulator, to which the drawings have been confined.

Non-add.

A non-add operation is effected by the depression of a'motor key 2'i5 (Fig. 4), the stem of which is provided with a cam surface At, acting in the depression of the key to move a slide 4| forwardly, thereby rocking a bell crank lever 42 and lifting a roller 43 thereof out of restraining engagement with a spring operated slide 44, illustrated also in Figs. 5, 6, 7. Upon release, slide 44 will move forwardly, a lug 45 thereof striking the upper arm of a pivoted latch H2 and releasing said latch from restraining engagement with a spring operated clutch control lever I06. Lever I'EB, being rocked counter-clockwise by its spring, an insulation roller I59 (Fig. 7) mounted on the lever will act to close a switch III] in the circuit of an electric motor IDD (Figs. 2, 9), and the lower end of lever I08 will be disengaged from the tail of a spring urged clutch pawl I03, allowing said pawl to fall into engagement with the driving clutch member I04, driven by motor I00. Pawl IE3 is mounted upon a plate I85, connected by link N38 with an arm 3H5, fast upon shaft 30I, upon which shaft a cam SIS (Fig. 25) is also fast. Counterclockwise rotation of plate I05 will reciprocate arm SIB and cam 3I8, the latter acting to effect reciprocatory movement of the actuator frame 656 in known manner (see, for instance, Patent #2355523, above mentioned) Operation of frame w(Sit will allow the type bars 6| I to rise to printing position in those columns in which the column latches 2 I4 have been released, lugs I54 of these type bars moving away'from latches I52 (Fig. 2) and allowing them to rise, under influence of springs I48 into the path of movement of lugs I55 of spring impelled hammers I46. Hammers I46 are normally restrained by a bail I49, suspended from a shaft I4I andconnected by links I58 with a rock arm I5I, fast upon a shaft 302, upon which shaft is also fast an arm 32'! having linkconnection with the motor driven arm 3I6. Thus, upon motor operation, bail I49 will be moved forwardly, permitting such hammers as have not been latched to rotategradually in a. clockwise direction, forcing the related type bars 6| I toward but not into engagement with the surface of platen 89L Near the end of this movement ofthe parts 9. lug I58 of arm I5I will engage the depending hooked end of a releasing bail I56,pivoted at I53 and r extending above the latches I52, the bail being rocked and the latches disengaged from the hammers I 48.

percussion contact with the record material supported onplaten' 89L In order to effect printing of zeros by the type barsto the right of those displaced by the actu-,

ators 610, the hammers are provided with over-.

lapping lugs I66 (Fig. 2), which will serve to hold any hammer to the right of one secured by'its latch. In other words, a latch' I52, uporrmove menr, of bail I53, will rele'ase its related hammer,

theright thereof,

main during a non-add cyclejof operation, 'so].

that any amounts subtracted fromthe accumulator wheels by the actuatorsduringfthe'forwarcl stroke of the operating means will be added back during the return stroke. However, a timed un meshing and meshing of these pinions is controlled by a switchfi (Fig. 4) which stands normally in position to determine additive registration, and this switch must be adjusted'to inactive position upon depression of the non-add key.

Switch 6 controls the accumulatorthrough an adjustable arm5 and cooperating means which will be described in connection with [the total taking devices. The switch is set to inactiveor non-add position by a slide I4, which is 'held normally under the tension of a spring I5 by engagement of the upper end of a lever 16 with a shoulder of the slide, lever I6 being provided with, an anti-friction roller normally engaging the high point of the cam portion of plate I05. .In the operation of the machine by clutch I03, I 04 lever 76 will be reciprocated, andslide. 1.4 will be a1- Therefore the hammerswill be vioiently operated by the springs I 48, imparting sufiicient momentum to the type bars bl I'to insure 5, lowed to move forward under the influence of spring 15 until a shoulder 18 of said slide contacts a ball 49 which has been displaced by the depression of non-add key 215. This partial movement of slide 14 is transmitted to switch 6 by means of an arm 19 (pivotally mounted upon the slide and held in relation thereto by the spring 15) and a link 80 connecting said arm with an arm of the switch. By this means switch 6 is rocked clockwise about .its pivot point 33 so that cam surface 2| thereof will lie parallel with the end of a lateral flange 22 of arm 5. Flange 22 and switch 6 lie in the plane of a roller I mounted upon the reciprocatory arm BIB, this roller, in the listing operation, moving idly above these parts, merely camming the forward end of the switch downward upon the forward and the return strokes of arm 3 l6 without displacing arm 5.

At the beginning of a non-add operation the forward movement of slide 44 to engage the clutch will engage said slide over a shoulder 48 of the stem of key 215, thus holding the key depressed and switch t in set position until restoration of slide 44, near the end of the cycle of operation. This restoration of slide 44, which also effects the release of the set digit keys H5 and allows the disengagement of clutch I03, I04, is effected as follows:

An anti-friction roller mounted on a lever 65 (Fig. '7) will be engaged by a cam projection of plate I65 as it approaches its full-cycle position, the lever being rocked clockwise against tension of a spring 66 and carrying therewith a lever 61 connected thereto by a spring 58. The upper end of lever 61 will be moved by the cam into contact with the lug 45 of slide 44, retracting the slide to and rearwardly beyond its normal position of rest, this extra rearward movement being utilized to clear the digit keyboard. For this purpose a pin 69 on slide 44 is brought into contact with one arm of a lever is (Fig. 5) intermittently fulcrumed upon a frame plate of the keyboard, rocking said lever into contact with a shutter plate H (see also Fig. 2) having lugs engaging shoulders of the key latching slides 54. Slides 54 will thus be moved forward, releasing the depressed keys-H5 for restoration by their springs 5|. As plate I95 arrives in full cycle position, lever 61 willbe allowed to return to its forward position, and slide 44 will follow it until roller 43 falls into latching engagement therewith, this movement of the roller being permitted by the unlatching of key 275 upon rearward movement of slide 44.

Total taking As is usual in listing machines, totals are printed by disengaging the actuators 519 from their column latches 2 l4 and from the frame Sit and allowing them to move subtractively under the influence of their springs, to rotate the accumulator wheels to zero, in which position the wheels are held by engagement with appropriate stops, after which the cycling of the machine will effect operation of the printing means and restoration of the actuator segments 6H].

These and other special functions are effected upon depression of the total key 218 (Fig. 4), under control of slide 74 and other spring slides lying beneath the balls 49 of the operating keys.

Depression of total key 2'78 will release slide 44 and start motor operation, as previously described and will also allow full movement of slide 14, to provide for subtractive operation, because there is no shoulder on slide 14 which may conto the ends of the accumulator shaft tit.

6 tact with the bail 49 of total key 219. The isulting movement of slide E4 to its extreme forward position will rock switch 8 clockwise about its pivot 33, whereby cam surface 2i of the switch will lie out of path of movement of roller I, so that arm 5 will not be displaced and the accumulator wheels will remain in mesh with the actuator segments Bis during the forward stroke of frame 6H3. At the end of the forward stroke roller 1, having momentarily displaced and passed beyond the switch, will lie directly in front of the surface 34 of the switch, with which it will engage during the return stroke of the operating mechanism, to raise arm 5 and disengage the pinions from the segments before additive movement thereof has started.

Lifting of arm 5 effects this disengagement by means of a rocker plate lls (Fig. 4) having yieldable spring connection 4 with said arm and to which is rigidly attached at ia (Fig. '7) an arm of a bail i, pivoted, in common with plate 499, upon a shaft 2. The arms of bail l are provided with extensions 3 having link connection with the joints of toggles iii, each pivoted at one end to the framing of the machine and at the other end The bail extensions 3 are ivotally mounted upon studs la and are yieldably held in contact with shaft 2, so that they will normally move with bail I, by springs ii. Shaft 4?? is mounted in guide slots of the machine frame and is held normally in rearward adjusted position by the springs 4 and ii. Lifting of arm 5 will rock plate H8 and ball i move shaft 4T2 forward, to disengage the accumulator pinions from the actuator segments 5 i i].

The accumulator wheels are rotated to zero registering position under control of a slide 8| (Fig. 7) which is locked out of operation by the balls of the non-add and other operating keys but which will be free to move, under the influence of its spring 82 upon forward movement of arm iii in total taking. Slide 8| has iink connection with an arm E34, pivoted upon the machine frame and provided with a finger E33 which will be brought during the movement of slide 8i into contact with an arm 62f pivotally mounted upon a rock lever 62d. Lever 825! has link connection with a toggle 357, one member of which is pivoted uponthe framing of the machine at 353, the other member being pivoted to one of a pair of plates 356, fast upon shaft 354. Fast with plates 355 are arms 356 (Fig. 2) supporting a rod or ball 355 extending beneath a series of latches 359 having link connection 352 with members 3%3, freely rotatable upon shaft 356 and provided with tripping fingers 3E4 adapted under the influence of springs 385 to disengage the segment latches til. Upon breaking of toggle 35f by slide 8i bail 355 will be moved downwardly under the influence of spring 3 3?! (Fig. 7), allowing the latches see to be operated at the proper times to trip the segment latches Ell.

Members 363, controlling the segment latches, also act, through links 366 to move zero stops 3%! (Fig. 2) so that shouldered portions thereof will be brought into the paths of movement of shouldered index stops 457, formed upon the accumulator wheels 473; whereby the wheels will be arrested and. held in zero registering position, against the pull of the actuator segment springs.

The zeroizing of the accumulator wheels is effected by successive operation of the wheels from right to left of the accumulator, the latches 369. with their links, forming toggles which are 

